Question about balancing rotating assembly

And BTW, there may be some confusion between some terms that leads to misconceptions: 'Damper' and 'balancer' and 'harmonic balancer'. Assisting balancing with that 'thing' on the front of the crank is one function. Damping the internal high frequency vibrations (harmonics) is a separate function (though it really is not a harmonic if I understand it right). That 'thing' on the front of the crank can do either one or the other, or both.

Folks tend to use all 3 terms interchangeably but that leads to confusion on what it actually does and perhaps helps make folks think that damping has something to do with balance. The 273, 318, 5.2L and early 340 engines only have a 'damper' function up front. The external 360 and 5.9L and late 340 (external balance engines) have both functions, so the term 'balancer/damper' (which nobody uses) or 'harmonic balancer' is the right term.